From a seemingly plain shell covered in calcium carbonate comes an incredible precious material referred to as "Mother of Pearl". Often used in fine jewelry, Mother of Pearl has long been admired for its array of iridescent colors. The Mini Jewelria offers large pieces of colorful shells that stand out against four brilliant backgrounds; Black, White, Blue and Pink. The Mini Jewelria Shell ballpens accept Monteverde D1 medium point refills available in 10 colors and/or D1 1.4mm point available in 6 colors.